#include <iostream>
#include <cmath>

using namespace std;

int main()
{
    const double pi = 3.141592;
    int radius = 3;

    double circumference;
    circumference = 2 * pi * radius;

    double area1;
    double area2;
    area1 = pi * (radius * radius);
    area2 = pi * pow((double) radius, 2);

    double volume;
    volume = (4/3) * pi * (radius * radius * radius);

    cout << "Circumference: " << circumference << endl;
    cout << "Area: " << area1 << endl;
    cout << "Area: " << area2 << endl;
    cout << "Volume: " << volume << endl;

    return 0;
}

